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US 6,204,795 B1Granted
Programmable incremental A/D converter for digital camera and image processing
AssigneeIntel Corporation
InventorMorteza Afghahi
Life of this patent
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Abstract
A method is provided having the steps of receiving a first pixel signal; generating a first set of bits representative of the first pixel signal; receiving a second pixel signal; and, generating a second set of bits representative of a difference between the first pixel signal and the second pixel signal. An apparatus and system for performing the above method is also provided.
Claims12
A method comprising:
- receiving a first pixel signal;
- generating a first set of bits representative of said first pixel signal;
- receiving a second pixel signal;
- latching said first set of bits;
- comparing said second pixel signal with a signal generated from said latched bits to determine whether said second pixel signal is greater than said first pixel signal;
- and
- generating a second set of bits representative of said second pixel signal based on a difference between said first pixel signal and said second pixel by using said latched bits as a starting value for calculating said second set of bits.
4 more elements
An apparatus comprising:
- an integrator;
- a comparator coupled to said integrator;
- a counter coupled to said comparator;
- a first latch coupled to said counter;
- a second latch coupled to said counter;
- and
- a digital-to-analog converter coupled to said comparator.
4 more elements
An imaging system comprising:
- a sensor;
- an analog-to-digital converter coupled to said sensor, said analog-to-digital converter comprising:
- an integrator;
- a comparator coupled to said integrator;
- a counter coupled to said comparator;
- a first latch coupled to said counter;
- a second latch coupled to said counter;
- and
- a digital-to-analog converter coupled to said comparator.
6 more elements
Dependencies are inferred from the claim text.